Allow building the MySQL driver with MariaDB libraries.

Closes #505

Author: dveeden

src/drivers/mysql/drv_mysql.c

@@ -109,7 +109,9 @@ typedef struct
   const char         *ssl_ca;
   const char         *ssl_cipher;
   unsigned char      use_compression;
+#ifdef MYSQL_OPT_COMPRESSION_ALGORITHMS
   const char         *compression_alg;
+#endif
   unsigned char      debug;
   sb_list_t          *ignored_errors;
   unsigned int       dry_run;
@@ -337,7 +339,9 @@ int mysql_drv_init(void)
 #endif
 
   args.use_compression = sb_get_value_flag("mysql-compression");
+#ifdef MYSQL_OPT_COMPRESSION_ALGORITHMS
   args.compression_alg = sb_get_value_string("mysql-compression-algorithms");
+#endif
 
   args.debug = sb_get_value_flag("mysql-debug");
   if (args.debug)
@@ -416,8 +420,10 @@ static int mysql_drv_real_connect(db_mysql_conn_t *db_mysql_con)
     DEBUG("mysql_options(%p, %s, %s)",con, "MYSQL_OPT_COMPRESS", "NULL");
     mysql_options(con, MYSQL_OPT_COMPRESS, NULL);
 
+#ifdef MYSQL_OPT_COMPRESSION_ALGORITHMS
     DEBUG("mysql_options(%p, %s, %s)",con, "MYSQL_OPT_COMPRESSION_ALGORITHMS", args.compression_alg);
     mysql_options(con, MYSQL_OPT_COMPRESSION_ALGORITHMS, args.compression_alg);
+#endif
   }
 
   DEBUG("mysql_real_connect(%p, \"%s\", \"%s\", \"%s\", \"%s\", %u, \"%s\", %s)",